Dipper-tooth for excavating-machines.



F. 0. RUSH.

DIPPBB TOOTH ron EXOAVATING momma.

APBLIOATIOH FILED 119.20, 1912.

1,131,426. Patented Mar.9,19-15;

We a 0. 772166.

' T ED STATES PATIENT QFFICE.

DIPPEB-TOOTH FOB EKCAVA'JJING-MASHINES.

Specification of Letters Patent,

Patented Mar. 9, 1915,

Application filed August 20, 1912. Serial E0. 718,0h5.

93b all whom it may concern."

Be it known that l, Fncn 0. Been, a citizen of the United States, residing at Wilmington, in the county of New Castle and State of Delaware, have invented certain new and useful Improvements in Dipper-Teeth for Excavating-Machines, of which the following is a specification.

My invention relates to'improvements in dipper teeth for excavating machines, and has for its primary object the provision of a tooth of this character in which the cutting point or tip may be renewed from time to time as it becomes worn or brolv wit :ut the necessity of discarding the entire tooth.

Another object of the invention is to provide means for securing such a removable cutting point or tip rigidly to the body portion of the tooth and holding the same against all movement relatively thereto.

A further object of the invention is to provide a'detachable cutting tip which will be capable of being reversed to afford a double cutting edge, thus prolonging the life and increasing the usefulness of the tip.

To attain the desired objects, the invention broadly stated consists of a tooth composed of three parts, a base or bod 1 portion for attachment to the bucket or ipper of the excavator, a tip holder secured to said basal portion, and a tip secured to said tip holder, the invention further consisting in certain novel features of construction and adaptation of .parts, substantially as shown, described, and claimed hereinafter.

' V Figure 1 is a side elevation of a dipper tooth constructed in accordance with and embodying the principles of my invention. Fig. 2 is a top plan view thereof. Fig. 3 is a section on lines 3-43 of Fig. 1. Fig. 4; is a section on line 44 of Fig. l, and Fig. 5 is a section on line 55 of Fig. 1.

.In the drawings :-The letter A designotes the body ortion or base of the tooth, which may be armed of any suitable material, and as the same is subjected to com paratively little wear, this material need not be of the same high quality 'asthat re- This body portion is provided at-its rear end with a ongitudinal slot B, adapted to engage the. front wall of the dipper, thus dividing the body portion into two portions or shanks C and D. These shanks may be of any suitable thickness and length relatively one to the other and the front wall of the dipper, but inasmuch as the greatest strain and wear comes upon the shiink C which is located on the inner face of the dipper front, this shank is preferably constructed of heavier material than the shank l) and is here shown as greater in length than the shank D. This construction permits the tooth as a. whole to be adapted to any size or type of dipper in use, said shanks being secured to the dipper by means of bolts or rivets passing through new therein.

The extreme forward end 1 tion is cut away or rabbet I duced portion 11, which is oess with a concave rear wait in the tip holder G, dBCfiCliar'f said body portion by the vertically therethrough.

The tip or cutting poi secured to the tip holder steel pin K passing trunsve hole L in the tip holder, pin being slightly chamt'ered to hold 11 in piace. All strain on. this pin is taken up by the lugs M formed on the tip and seated. in recesses N in the tip holder.

It will thus be seen that the tip holder can be made to fit any base now in use, and that the base can be adapted to any type of dippeigivhile the cutting point or tip is I t i'i'li'ormed tired to passing "etachebly of a soft through a reversible and therefbre has double the life newing the body portion. This construction enables me to make the cutting point of the tooth, which receives the largest part of the wear and strain, of a very high grade of material, while the body portion of the tooth may be of an inferior grade of material, if desired, thereby reducing the cost of manufacture and effecting a material saving not only in the body portionof the tooth, but in the tip as well, as this tip can be reversed and when worn upon both cutting edges, be renewed without discarding the body portion thereof. It will also e seen that the cutting point of tip is so mounted as to be held against all movement relatively to the body portion, thus providing a tooth which is practically integral therewith and possesses all the qualities of such a tooth without having any of its disadvantages.

The tooth it will be noted is made of sections fitted together and the advantage of this resides in the factthat should a section become worn or broken, a new section can be furnished and at a small cost. making it unnecessary to supply a new tooth at a great expense and difiicult I claim l. A dipper tooth, comprising a body portion having a tapered nose and at its rearend a longitudinal slot adapted to engage the front wall of a dipper providing oppositely disposed shanks, said shanks being of difi'erent lengths, a tip holder having a tapered recess for receiving the nose of said body portion, means passinggtransversely through said holder and shankYa'nd traversing said slot, and a reversible tip detachably connected with said holder, said tip and tip holder having recesses-and ribs forming interengaging means for taking the strain from the connecting pin of said tip.

2. A dipper tooth, comprising a body portion having a tapered nose and at its rear end a longitudinal slot adapted to engage the front wall of a dipper, providing oppositely disposed shanks, said shanks being of different lengths, a tip holder having a tapered recess for receiving the nose of said body portion, means passing trans vrrsely through said holder and shanks and traversing said slot, and a reversible tip having a tapered nose portion and an inner curved end detachably connected with said holder, said tip and tip holder having recesses and ribs forming inter-engaging means for taking the strain from the connecting pin of said tip, said pin passing transversely through the tip and holder.

In testimony whereof I atlix my signature in. presence of two witnesses.

FRED O. RUSH. Witnesses HARRY A. HUNT, WM. L. JACKSOY 

